158 



ORGANOGRAPHY. 



terminates at a short distance Avithin it, the leaf is said to be 

 indented or toothed, of Avhich we have several varieties. Thus if 

 the teeth are sharp like a saw and all point to the apex, the leaf is 

 aerrate {fig. 291), as in the common Nettles. If these teeth are 



Fig. 301. Fig. 302. 



Fir/. 301. Sinuated leaf of the Oak Fig. 



302. Spiny leaf of Holly {.Ilex Aquifo- 

 lium). 



themselves serrate, it is hiserrate or duplica to-serrate ( figs. 300a. 



by and 314), as in the Nettle-leaved Bell-flower. When the 

 leaf is minutely serrate it is termed 

 serrulate, as in Barosma serrulata. 

 When the teeth are sharp, but do 

 not point in any particular direc- 

 tion, and are separated by concavi- 

 ties, the leaf is dentate or toothed 

 (figs. 289 and 354), as in Nymphcea 

 deniafa, and the lower leaves of the 

 Corn Blue-bottle. When the teeth 

 are themselves divided in a simi- 

 lar manner it is dupUcato-dentate 

 ( fig. 300a. c). When the teeth are 

 rounded {figs 299 and 326) the 

 leaf is crenate, as in Horse-radish, 

 and Ground Ivy ; or if these 

 teeth arc tlicmselves crenated it is 

 bicrenate {fig. 300a, a); or when 

 tlic leaf is minutely crenated, it is 

 said to be crenuhited. AVhcn the 

 marj^in presents ahcrnately deep 

 concavities and convexities it is 

 sinuate, as in some Oaks {fig. 301); 

 Avhcn the margin is sliglitly .sinuous 

 and wavy, as in the Holly {fig. 



302), it is said to be wavi/ or undulated; or when the margin 



Fiij. 503. Criupert leafof a species 

 of Mallow iMiiha). 



